Shedding mechanism



Ju1 1o,192s. 1,676,870

A. C. RlFE SHEDDING MECHANI SM Filed June 19, 1926 I 2 Sheets-Sheet lJuly 10, 1928. 1,676,870

. A. C. RIF E SHEDDING MECHANISM Filed June 19, 1926 2 Sheets-Sheet 2 lwill FIG. 4

Patented July 10, 1 928.

, oar-r ream SHEDDIN G MECHANISM.

Application filed June 19, 1926, $erial No 1 1 7,200, and in SpainAugust 31', 1925.

said loomiby the feet .1. and 2 the Many are the advantages which thenew apparatus offers in relation to those known under the name ofdobbies; in the first place, its absolute security and regularity inoperation while in the case of the former, the ribs of wood, the plugsscrewed on to them, the mechanism of a plurality of complicated smallpartswith needles and hooks, are mechanisms complicated and fragile inthe extrema/and give rise to frequent breakages and constant errors andin consequence .a production of defective pieces.

In this new apparatus the simplification of the mechanism has beenreduced to its utmost limit, thereby giving to the various elementsembodying my invention, a rigidity capable of resisting a maximum stressthus preventing all breakage and" faults generally experienced inprevious devices.

Furthermore, over the mechanism known as the Segment system it haslikewise numerous advantages, seeing that the new apparatus is placedabove the loom and moved by a simple rod, whichenables immediately anyirregularity in operation to be detected, the oppositeof what occurs inthe case of those in which the delicate mechanism of contact, which iseffected by means of small pulleys placed within a small stop with asingle pointof support, is totally obstructed by large discs and wherewith fre-' quent breakages of the small pulleys, stops and levers, thesegment continues to operate, causing the consequent defects.

Other important advantages of the invention will be in part obvious andin part pointed out hereinafter; In order that the invention and itsmode of operation, may be readily understood by those skilled in theart, I have in the accompanying drawings, set out one possible embodiment of the invention.

In these drawings- Figure 1 is a side elevation of the, device, Figure 2s a s1m1lar VIEW showlng the opposite side of the device,

Figure 3 is an end view of the same, and

Figure 4- is a vertical longitudinal sectional view showing cooperativeaction of the levers and the cams.

The machine consists of a frame, constituted by two benches 1 and 2fastened together by means of the cross-pieces 3, 4 and 5. the loom andfixed to the jamb-posts of the The frame thus formed is arranged overbenchesland Zfrespectively. I

In the framework itself is fixed an axle 6 on which are freely mountedthe levers 7 each of which support by one of its extremities 7', the rodof suspension of flier-espective heald, while at'the other extremitythey formthe support 8, of a pulley or roller 9, against which acts therespective cam 10, which is rigid with the axle 11, moun'ted likewiseon. the framework 1,2. The number of cams 10, mounted .on theaforementioned axle, is equal to that of the levers 7 and their'profileis variable inaccordance with the movements which they are to transmit.The said, levers are guided laterally by means of the cross pieces t and5', for

which purpose th'elatter are formed with the openings 4T and, 5respectively, for the passage of the levers. Furthermore on. the plate4, corresponding to the arm 'Z'Qof the lever 7, is arranged'ahorizontalplate '12,

' on which. rest the levers 7, and whose posi- 1 tion can beadjusted atwill.- .7 v The axle 11, has fixed 'uponit, at one of its extremities aratchet wheel 13, operated by a system oftwo pawls-14, which b theaction of the spring 15 tend constant y to work against the same. Thepawls referred to, have a common axis of rotation 16 and this is mountedon a lever 17, rigid with an axle 18, which at one end has joined to itthe tension rod 19, which, transmits the movement of the loom to theafore-mentioned lever. The latter, furthermore, is provided'on itsopposite arm with a balanceweight 20. The arrangement of the doublesystem of pawls serves the purpose of attaining the working of themachine at every movement, both upwards and downwards of the tension rod19.

Furthermore on the axle 11 itself, is if mounted the brake 21, designedvto counterbalance the abrupt action of the-springs which work on theshafts, and at its opposite end it carries likewise fixed a toothedpinion 22, which transmits its movement to a wheel 22' to which. isrigidly attached the star wheel 23, which, together with the sector 24:,having the stops 25, which'can impose themselves between its teeth,consti tute the mechanism ofretention and escapement of this machine,designed to ensure good working. The sector has its axis at, 26, and isset in action by means of the tained various sorts of texture of Warpwithv the woof, this variety of texture being .ob-

tained by the application of cams of different throws and the number ofshafts and levers,can be equally variable according to the fabricrequired. Moreover, each shaft of the loom rises with a single'lever asdescribed, but it can be also actuated by means of a double lever.

It is to be understood that the invention is capable of manymodifications and those modifications that are'within the scope of theclaims, I considerfwithinthe spirit of the invention.

Asa basis of thisipatent there is claimed as follows '1; 1Ashedding'mechanism comprising in combination with levers, operatingcams, a movable arm, a pawl member carried by said arm, means rigidlymounted with said cams and engaged by the pawl member for rotating thecams,and means associated with said arm and cams for locking and freeingthe latter with movement of the arm;

2. A shedding mechanism comprising in combination with levers,operating. cams,'a movable arm, a double pawl carried by said arm andadapted to move" therewith, a ratchet'rigidly mounted with said cam andengaged by the pawls for rotating the cams,

gearing rigid'with; the cams, and means In testimony whereofI havemoving in unison with said arm and engageable with said gear ngs'forlocking and freeing the cams with movement of the arm.

b. A. shedding mechanism for looms comprising in combination withlevers, actuating cams, a balance arm receiving an up and down movementfrom the loom, a double pawl carried by the arm and adapted to movetherewith, a ratchetf'rigidly mounted w l h the cams and engaged by thepawls for rotating said cams, a star wheel operatively connected to"said cams and a segment mounted to move in unison with the balance arm,and adapted to engage said wheel with I the down movement of said armwhereby to lock the cams against rotation.

' 4. A shedding mechanism-comprisingin "combination with levers,rotatable cams ac- 'tuating'said levers,;a movable arm opera "tivelyconnected to said cams'to rotate the same, and means associated withsaid arm and cams for lockingand freeing the latter with movement of thearm. i I

5. A shedding mechanism comprising a frame, a plurality of leverscarried by the frame, a cam shaft for actuating said levers, a movablearm operatively connected with saidcain shaft to rotate the same, abrake member mounted on a cam shaft and means associated with said armsand cam shaft for locking and freeing the latter. with movement of thearm.

signed my nametothis specification.

ANTONIO CALVETRIFE.

